Looks like a really interesting project. The biggest issue I have with it is that for it to thrive in the ecosystem, it is dependent on regular users actually donating money each and every month by purchasing and spending BAT tokens. Convincing regular people to switch from free browsers such as Chrome and Firefox, over to Brave won't be easy.

Brave is free just like Chrome and Firefox, but the revenue model is based on BAT, so unless there's not enough people donating BATs they might not make it in the long run.